Machine for insulating armature windings



Jan. 1, 1924 W. E. MOORE MACHINE FOR INSULATING ARMATURE WINDINGS FiledSept. 12. 1921 4 Sheets-Sheet 1 gmvcw-foz 5. Maw

Jan: 1', 1924 W. E. MOORE MACHINE FOR INSULATING ARMATURE WINDINGS FiledSept. 12, 1921' 4 Sheets-Sheet 2 INVEN TOR.

Jan. 1, 1924 Filed Sept. 12, 1921 4 Sheets-Sheet 5 BMW Id 5 k I N V ENTOR. WM f I vM /A 2 wk Z2 t. mt

A TTORNEY.

Jan. 1, 1924 1,479,248

w. E. MOORE MACHINE FOR INSULATING ARMATURE WINDINGS Filed Sept. 12,1921 4 Sheets-Sheet 4 INVENTOR.

iii ,44.

A TTORNEY.

Patented Jan. 1, 1924.

UNITED STATES PATENT OFFICE.

WILLIAMS I. 110032, or DETROIT, MICHIGAN, ASSIGNOB 'ro WILLIAM J.HABTWIG, or

nnrnorr, IIIcII oaN.

MACHINE FOR INSULATING ARMATURE WINDINGS.

Application filed September 12, 1921. Serial 1T0. 500,188.

To all whom it may concern:

Be it known that I, WILLIAM E. Moons, a citizen of the United States,and residing at Detroit, in the county of Wayne and State of Michigan,have invented a new and Impl 'oved Machine for Insulating Armatureindings, of which the following is a specification. I p

This invention relates to means for securing the windings of thearmatures of electric generators and motors in the longitudinal roovesin the cores of such armatures and Its object is to provide a devicewhich will shear a narrow strip of heavy insulating material from a bandand drive this strip down into the groove in the core onto the windingstherein, and to provide means to turn the armature at each operation ofthe shear so as to present a second groove after a first has beenfilled.

This invention consists in a support for the ends of the shafts ofarmatures for electric motors and generators and a base therefor, aguide and a stationaryshear member for bands of insulating material, amovable shear member which is adapted to force the sheared stri s ofinsulating material into the longitudinal grooves in the cores of thearmature onto the windings therein, a reciprocating head on which themovableshear member is mounted, and means actuated by the head to turnthe armatures step-bystep so as to carry succeeding grooves tostrlp-receiving position. It further consists in means actuated by thehead to stop the mechanism when the armature therein has made onecomplete rotation. It also consists of the details of constructionillustrated in the accompanying drawings and particularly pointed out inthe claims.

In the accompanying drawings, Fig. 1 is a front elevation of a machineembodying the present invention. Fig. 2a plan thereof. Fig. 3 is anelevation of a stop lever. Fig. 4

is a section on the line 4-4 of Fig. 1. Fig. 5 is an end elevation ofthismachine. Fig. 6 is a section in the line 6-6 of Fig. 1 on a largerscale. Fi 7 is a front elevation of the mechanism s own in Fig. 6.

Similar reference characters refer to like parts throughout the severalviews.

Narrow strips of heavy insulating paper or com osition are often forcedinto the longitu inal grooves in armature cores onto the windingstherein so as to act as retainers therefor, the insulating strips beingof such width that when forced into the s aces be tween the outer edgesof the wal s of the slots, the friction between these walls and thestrips is sufficient to hold the strips and the windings in position. Inmany cases the armature is thereafter dipped in roper in sulating liquidand then baked which results in the windings being imbedded in a solidmass of insulating material.

The mechanism shown in the drawings is adapted to be used in connectionwith many types of punch presses, Fig. 3 showing the table 1 on whichthe base 2 of this machine is mounted and the frame 3 in which the usualhead 4 is vertically slidable. On the base are mounted a head-stock, atail-stock and a shear frame. The head-stock is adapted to receive andsupport one end of the armature shaft and rotate it, the tailstock isadapted to receive and sup ort the other end of the armature shaft anpermit its rotation, and the shear frame is adapted to receive the coreof the armature and position a band of insulating material relativethereto so that strips may be out therefrom by means of a blade mountedon the vertically slidable head. which strips are pushed down into placeby means of the blade. As shown in Figs. 1 and 2, the blade 5 may besecured in position in a holder fi by means of screws 7 and the holdersecured to the head 4 by means of screws 8. A cross bar 9 which operatesthe feeding mechanism may be secured to the head by means of bolts 10.

The headstock.

The head-stock has a foot 12 and a body 13 in which the cylindrical heads indle 14 is rotatable, a thrust bearing 15 0 any desired characterbeing employed. Mounted within the head are the tapering jaws 16 of wellknown desi which are adapted to wedge down into t e armature shaft whenthat is forced into the head. These jaws together are often known as acollet. A sleeve 17 extends outward from this head and is journaled inthe bracket 18 mounted on the foot 12. Jamb nuts 20 prevent inward movement of the spindle 14. Secured on the sleeve 17 and between the body 13and bracket 18 is a ratchet wheel 21 whereby the head spindle 14- may berotated. The teeth of this ratchet wheel are of the same number as thegrooves 78 in the core of the armature 60 being operated upon, thisbeing shown in Fig. 4.

A bracket 26 extends upward from the base 2 and carries a in 27 on whichthe lever 28 is mounted. pawl 29 is mounted on a pin 30 carried by thislever and a spring 32 between the pin 33 on the lever and the -pin 34 onthe pawl holds the lower end of this pawl against the ratchet wheel 21.The downward movement of this lever is limited by a post 35 whilean arm36 secured to the end of the cross bar 9 by a screw 31 extends down andis bifurcated to receive the lever 28 and is formed with a longitudinalhole to receive the spring 37. The forked lower. end of this arm isformed with slots 38 for the in 39 by means of which the lever and pawlare elevated.

As the head of the press rises and falls, the arm 36 moves with it,lifting the lever 28 at the end of its upward movement and depressing itat the beginning of its downward movement so that the armature will beturned at the beginning only of the downstrolre of the press.

The tailetock.

The tail-stock has a body 41 mounted on a foot 42 which may be securedto the base by the screws 43. The body is bored to permit free movementof the spindle 44 and is also formed with a longitudinal slot 45 and atransverseslot 46 at the end thereof to permit the passage of the handle47 which connects to the spindle and by which it may be moved back andforth and be locked at its inner position.

The inner end 49 of the s indie is rotatable relative to the main bo ythereof and has a stem 50 rotatable therein. It also has a central hole51 to receive one end of the armature shaft. Extending longitudinally ofthe base is a releasing rod 53 which connects at its left end to theknock-out rod 54, this rod 54 being slidable in the sleeve 17 andterminating at about the point 55. The right end of the releasing rod isbent up and then in, being reduced between the shoulders 56 and 57 whichlimits its movement b contacting with the screw 58 mounted in the tailspindle.

The armature 66 and its shaft 61 are indicated in dotted lines inFig. 1. When the armature has been properly supplied with insulatingstrips. the handle 47 is swung up to a vertical position and moved outalong the slot 45, carrying the spindle 44 with it, usually leavingbehind the armature which is supported by the collet 16. After thespindle has moved to the right sufficiently to carry the screw 58against the shoulder 57 of the rod 53, this rod is also moved to theright carrying with itthe knock-out rod 54 which strikes against theleft end of the armature shaft 61, driving it out of the collet 16 orfreeing the collet from the grip of the tapering end of the head spindle14. The operators right hand moves the handle 47 while his left receivesthe right end of the armature shaft which can be readily moved out ofthe shear frame without being bruised.

V The shear frame.

The stationary shear is mounted on a .block 70 having a cylindricalcavity 71 to receive the armature and the shear consists of a lowerplate 72 on which the band 74 of insulating material is slidableand aguide plate 73 which has its lower side cutaway to form a passage forthis band, as indicated in Fig. 1. This plate 72 co-operates with theblade 5 to cut the band 7 3 into strips, the width of which isdetermined by a stop-plate 76. The band is fed in by the operator and ateach downstroke of the blade 5 a narrow strip 77 is cut from the bandand forced down into a groove 78 in the core of the armature 60 onto thewindings 7 9 and 80 therein. As shown in Fig. 4,

these grooves are preferably quite narrow at the surface of the core andthe walls of the grooves are substantially parallel where the strips 77are driven in so that their escape is improbable.

When an armature is to be provided with these sealing strips, it isslipped into the cavity 71 in the block 76 with one end of its shaft inthe collet 16.

The tail spindle 44 is then moved inward to support the opposite end ofthe armature shaft. Mounted on a small shaft 82 carried by a lug 83 is alocating linger 84 normally held out by the spring 85. A pin 86 isadapted to turn this shaft and swing the locating finger into one of thegrooves 78 of the armature core to aline this groove with the blade 5.After the core is properly positioned, the tail spindle is forced inwardto the limit of its movement which causes the adjacent end of thearmature shaft to be gripped by the collet 16 to cause the armature toturn with the ratchet wheel 21.

The punch ress has the usual driving mechanism an stop mechanism. A rod86 is provided which is automatically pulled up by a spring 87 of thestop mechanism of the machine at the end of each stroke but when helddown, prevents the stop mechanism from working. its thisis a well knownmechanism in punch presses everything ex:

cept the lower end of the rod is omitted. lnstead of the usual treadle,a lever 88, (Fig. 3) is shown attached to this rod 86, the lever beingmounted on a pin 89 carried by the bracket 26. 1 An operatin handle 90is attached to this lever 88 by a bolt 95 and both lever and handle areheld in alinement against the bracket 26 by means of a washer 92, spring93 and nut 94 on this pin 89.

Attached to the outer end of the sleeve 17 is a cam 96 which has a notchto receive a tooth 97 on this handle 90, which notch permits the rod 86to rise and the press to stop. As there is but one notch, the sleeve 17,the

1';- collet 16 connected thereto, and the armature shaft all gripped bythe collet will make one revolution and then stop. In order to causethem to rotate the operator lifts the handle 90 to pull down the rod 86and holds up this handle until the press has made one stroke and the cam94' has moved the notch from under the tooth 97. If the o rator shouldwish to stop the press before t e cam reaches the position shown in Fig.3, he

; pushes the frbnt end of the handle 90 to the left against the pressureof the spring 93 which carries the tooth 97 from the plane of the camand permits the spring 87 to pull up the rod 86 and stop the press. Tostart the press it is merely necessary to swing the handle 90 up intothe cam 96 which pulls down the rod 86, y

The details of construction and the proportions of the several parts ofthis device may all be changed by those skilled in the art withoutdeparting from the spirit of my invention as set forth in the followingclaims.

1. In combination, means to rotatably support an armature shaft and toturn it step-by-step, and means to shear strips of insulating materialand to force the strips into the grooves in an armature core onto thewindings therein.-

2. In combination, means to rotatably support an armature shaft and toturn it step-by-step, and shearing mechanism embodying reciprocatingblade to' shear strips of insulating material and to force the stripsinto the grooves in an armature core onto the windings therein.

3. in combination, means to rotatably support an armature shaft and toturn it step-by-step, means to support a band of insulating material,and means to shear strips therefrom and to force the strips into thegrooves in an armature core onto the windings therein.

4. In combination, means to rotatably support an armature shaft and coreand turn them step-by-step, means embodying an arm adapted to be swunginto one of the grooves in the armature core to position the armature,and shearing mechanism embodying a armature core and shaft, means shearstrips of insulating material and to iorce the strips into the groovesin the core onto the windings therein, and a longitudinally movable rodadapted to engage the end of the armature shaft to force it out of thesaid ripping means.

7. n combination, means to rotatably support an armature shaft, shearingmechanism including a reciprocating blade to shear strips of insulatingmaterial and to force the strips into the grooves of an armature coreonto the windings therein, a vertically movable head on which the bladeis mounted, and means operated by said head to turn the shaftstep-by-step.

'8. In combination, a head-stock and a tail-stock, a rotatable spindlemounted in the head-stock adapted to receive one end of an armatureshaft, means to turn the same stepby-step, a spindle mounted in thetail-stock adapted to receive the other end of the armature shaft, meansto slide the spindle in the tail-stock, means adapted to be engaged bysaid spindle in the tail-stock and extending into the spindle in thehead-stock whereby the armature shaft may be forced out of the spindlein the head-stock, and means to shear strips of insulating material andto force the strips into the grooves in the armature core onto thewindings there- 9. In combination, means to rotatably support anarmature shaft and to turn it step-by-step, a shear support having acylindrical cavity to receive the armature core, stationary shearmechanism mounted on said support, a slotted head and a verticallyreciprocating blade mounted in the slotted head to shear strips ofinsulating material and to force the strips into the grooves in thearmature onto the windings therein. 1

10. In combination, a rotatable spindle ada ted to receive and supportan armature sha a vertically reciprocating head and a blade securedthereto and adapted to shear strips of insulating material and to forcethe strips inco the ves in an armature core onto the win in therein, aratchet wheel attached to sai rotatable spindle, a lever mountedadjacent thereto, apawl on r evaaae the lever adapted to engage theratchet prising a frame adapted to rotataloly supwheel, an arm on thereciprocating head and port an armature, a strip carrying means a springmounted in said arm adapted to reciprocably supported by said frameandlO engage the lever to force down the pawl being adapted to wedge astrip of material 5 to turn said spindle, and a stop to limit 'into theslots of the armature, whereby the the movement of said lever and pawl,v stripsare firmly held in the slots.

11. A device of the type described com- Y WILLIAM E. MOORE.

